1323211052021 has 4 divisors (see below), whose sum is σ = 1353983402112. Its totient is φ = 1292438701932.

The previous prime is 1323211051957. The next prime is 1323211052027. The reversal of 1323211052021 is 1202501123231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1323211052021 - 2⁶ = 1323211051957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323211052027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15386174981 + ... + 15386175066.

It is an arithmetic number, because the mean of its divisors is an integer number (338495850528).

Almost surely, 2^{1323211052021} is an apocalyptic number.

It is an amenable number.

1323211052021 is a deficient number, since it is larger than the sum of its proper divisors (30772350091).

1323211052021 is an equidigital number, since it uses as much as digits as its factorization.

1323211052021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30772350090.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1323211052021 its reverse (1202501123231), we get a palindrome (2525712175252).

The spelling of 1323211052021 in words is "one trillion, three hundred twenty-three billion, two hundred eleven million, fifty-two thousand, twenty-one".